Rolldown vs tsdown
Rolldown
rolldown.rstsdown
tsdown.devSide by side
| Figure | Rolldown | tsdown |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Plans published | 1 | 0 |
| Spec score · JavaScript Build Tools | 8.7 (#1) | 7.0 (#27) |
| Intended users | The maker recommends using Rolldown through Vite for most applications and points library authors to tsdown. | The documentation describes tsdown as a tool for library authors, from small utilities to complex libraries. |
| License | Rolldown is free and open source; VoidZero states that it remains open source and MIT-licensed. | The project website states that tsdown is released under the MIT License. |
| Purpose | Rolldown is a Rust-based bundler for JavaScript with a Rollup-compatible API and esbuild feature parity. | tsdown is a bundler designed for building TypeScript and JavaScript libraries. |
Plans
In their own words
Rolldown
Rolldown is a free, open-source JavaScript bundler written in Rust and designed as the unified bundler powering Vite 8+. Its Rollup-compatible plugin API can reuse most existing Rollup plugins. Built-in capabilities include TypeScript and JSX transforms, syntax lowering, module resolution, ESM and CommonJS interoperability, define, inject, and minification. It can handle mixed ESM and CommonJS module graphs and supports configurable manual code splitting. Install commands are provided for npm, pnpm, yarn, bun, and vp. Prebuilt binaries are listed for Linux, Windows, Apple platforms, Android, and other targets; where none is distributed, a Wasm build or building from source are options. The guide recommends using Rolldown through Vite for most applications and points library authors to tsdown. Module types are experimental, and the JavaScript build() API may change in patch releases. The troubleshooting guide says Windows file-system access can slow builds, particularly when transforms run without plugins. An online REPL is linked, along with GitHub, Discord, and contribution resources. VoidZero Inc. holds the copyrights, funds development, and directs the project; it states Rolldown remains open source and MIT-licensed.